To inject all dependencies in a custom widget controller's constructor, which method is recommended?

Using ObjectFactory and registering dependencies in the UnityContainer is the recommended method for injecting all dependencies in a custom widget controller's constructor in Sitefinity. This approach allows developers to take advantage of a robust Dependency Injection (DI) framework provided by Sitefinity.

When using UnityContainer, it simplifies the management of object lifetimes and dependencies, which is essential for maintaining clean and testable code architecture. By registering dependencies in the container, you ensure that the necessary services are available when the widget controller is instantiated, allowing for seamless integration and functionality.

This method also supports configuration through the web.config or programmatically, providing flexibility in managing dependencies. It leverages the built-in features of Sitefinity’s DI framework, aligning with best practices for dependency management in modern applications.

Other methods, such as using DependencyResolver or ServiceLocator, introduce complexities and can lead to anti-patterns like Service Locator and tight coupling. Creating a custom DI container is generally unnecessary and can complicate the application architecture, as Sitefinity already provides a powerful DI solution with UnityContainer. Therefore, opting for UnityContainer to register dependencies is the most effective and efficient approach when working with Sitefinity custom widget controllers.